Telescopic antenna



J1me 2;, 11964 P- E. BOURASSA 3,135,363

TELESCOPIC" ANTENNA Efled' Dec. 9, 1959 2 Sheets-Sheet l June 2, 1964 P. E. BOURASSA 3,135,363

TELESCOPIC ANTENNA Filed Dec. 9, 1959 2 sheets-sheet 2 United States Patent 3,135,363 TELESCOPIC ANTENNA Paul E. Bourassa, Westview, British Columbia, Canada (6454 Seton Ave, Powell River, British Columbia, Canada) Filed Dec. 9, 1959, Ser. No. 858,507

I 1 Claim. (Cl. 189-26) This invention relates to new and useful improvements in antenna and more particularly to a telescoping antenna adapted to be mounted on ground level.

Several types of tower antenna are in use but, in all cases the antenna is mounted, and secured to roofs of houses. This condition is not desirable since roofs are frequently damaged either by the antenna base or by guy wires used to secure the said antenna.

In the present invention the tower is mounted on ground level on a concrete base on which the tower is manually rotatable to line up the antenna in any desired direction.

In the accompanying drawing the mast is shown in three sections but I do not wish to restrict myself since two or more sections could be used to form a complete antenna mast.

Broadly, the invention comprises a concrete base, a base plate anchored to said base a footstep centrally located on said base plate, a pintle riding on said footstep, a direction regulator disc manually rotatable, locking means for said regulator and telescoping masts mounted over said regulator, a ring carrying guy line eyes is secured to the upper extremity of each section so that each section is properly anchored When extended.

The primary object of the invention is therefore the provision of a telescoping antenna which is mounted on the ground surface and which can be extended well above antenna constructed in accordance with the present invention.

With these and other objects in view that may appear as the description proceeds, the invention consists in the novel arrangement of co-operating elements as hereinafter more specifically set forth, claimed and shown in the accompanying drawing forming part of this application, and in which:

FIGURE 1 is a fragmental front elevational sectional view of the section raising and locking mechanism;

FIGURE 2 is a plan view of FIGURE 1;

FIGURE 3 is a sectional elevational view of the base, the lower section and the manually rotating mechanism;

FIGURE 4 is a plan view of FIGURE 3;

FIGURE 5 shows the rotatable collar formed with a plurality of guy line plates;

FIGURE 6 is a plan view of FIGURE 5 FIGURE 7 shows the antenna partially elevated, and

FIGURE 8 shows the antenna fully extended.

Referring more in detail to the drawings in which similar reference characters designate corresponding parts throughout the several views, it will be seen the invention comprises a concrete base 10 provided with anchor bolts 11 for securing a base plate 12. Centrally of the base plate is formed a footstep housing 13 within 3,135,363 Patented June 2, 1964 which is a footstep 14. The tower comprises a plurality of telescoping sections mounted over a bottom plate 15 secured to the section by means of lock screw 16. Directly over the base is a direction regulator disc 17 held in a selected position by means of a lock pin 18. The regulator disc is formed with a plurality of holes 19 through which the lock pin is threaded and into a hole 20 formed into the concrete base. A square stud 21 is formed integrally with the regulator disc 17 and a rectangular hole is formed in the bottom plate 15 to register with said stud to cause the tower to rotate when the regu lator disc is rotated.

The mast comprises a plurality of telescoping sections and the top extremity of each section except the uppermost section is constructed as hereinafter described and illustrated in FIGURE 1 of the drawing. At the upper extremity a bearing plate 22 is set over the pipe and held in position by spaced apart lock screws 23. A bearing ring 24 formed with a plurality of spaced apart eye plates 25 is disposed over and rotates freely on said bearing plate 22. A hole 26 is formed in each plate to secure a guy line 27. The bearing plate is formed with spaced apart openings 23 to allow passage of the hoist Wires which will be hereinafter detailed. A pulley and casing 29 is mounted on the bearing ring 24 for the purpose of hoisting the next section. Near the lower extremity of the next section a hoist cable clamp 30 of suitable design is formed and a hoist cable 31 is secured thereto. The said cable is threaded through the pulley 29 and down through is opening 28. When the section is raised, the free extremity of the hoist cable is wound around a cleat 32 formed around the lower end of the bottom section. The hoisted section is retained at the desired height by means of a spring loaded lockpin. The said lock pin mechanism comprises a casing 33 formed with a square hole therethrough, a square lock pin 34 slidable therein, a compression spring 35 at the rear of the Pin to urge the said pin forward and a threaded cap 36 to hold the spring in position. A lever 37 is fulcrumed beneath the pin and a lock string 38 is secured to the lever. A metal strip 39 is welded on the upper pipes and square holes at close proximity to each other are formed through said strip annd pipe wherein the lock pin 34 fits to secure the section at any desired height. To lower the section, the lock string 38 is actuated to disengage the lock pin and the section is lowered by releasing the hoist wire 31. Each section other than the lower section is raised and lowered by means of a similar mechanism secured at the upper extremity of each section. The upper most section is guyed by means of a rotating guy wire ring 39 supported in position by means of a sleeve 40 welded in position. With the guy line rings free to rotate on their respective section it is possible to raise the mast to the desired height and rotate the antenna in any desired direction.

It is believed that the construction and advantages have been fully set forth and that further detailed description is not necessary.

While the preferred embodiment has been disclosed, it is to be understood that minor modifications may be resorted to without departing from the spirit of the invengagement in the socket of said mast releasably connecting the mast and disk together, a base member, a base plate of less diameter than said disk mounted on said base member, a footstep bearing mounted in the center of said base plate surroundedby an annular collar, a pintle pin 5 depending from the center of said disk in rotatable bearing engagement With said footstep bearing, and a lock pin insertable through one of a series of apertures formed in said disk adjacent its peripheral edge, said pin being adapted to engage in a hole formed in said base member 10 to secure said mast in adjusted position.

References Cited in the file of this patent UNITED STATES PATENTS Hanna Mar. 22, 1887 De Conti June 23, 1953 Holman Aug. 4, 1953 Holt July 13, 1954 Badertscher et a1 May 17, 1955 FOREIGN PATENTS Great Britain Apr. 30, 1925 

